[DeTomaso] Cleveland EFI Project, looking for help on adding intake manifold injector pockets

[wkooiman at earthlink.net]

I've heard the opposite.

Aiming the fuel directly at the backs of the valves might work for OEM's, where they can also choose the proper injectors, and get everything perfect, but I believe it's mostly done for fuel economy.

The fuel in the intake tract is bouncing all over the place.  It's probably just as good to aim it at the wall of the intake port.

-----Original Message-----
>From: Ken Green <kenn_green at yahoo.com>
>Sent: Nov 2, 2009 5:51 PM
>To: detomaso at realbig.com, JDeRyke at aol.com
>Subject: Re: [DeTomaso] Cleveland EFI Project,	looking for help on adding intake manifold injector pockets
>
>Jack,
> 
>    I've heard the same thing about aiming the injectors, but I've been looking at after market EFI manifolds (Edelbrock, FAST, Holley, etc.) and they all seem to put the injectors as close to the head as possible and they are vertical.  I'll be at the SEMA show tomarrow and will ask as many people as I can.
> 
>Ken
>
>--- On Mon, 11/2/09, JDeRyke at aol.com <JDeRyke at aol.com> wrote:
>
>
>From: JDeRyke at aol.com <JDeRyke at aol.com>
>Subject: Re: [DeTomaso] Cleveland EFI Project, looking for help on adding intake manifold injector pockets
>To: kenn_green at yahoo.com, detomaso at realbig.com
>Date: Monday, November 2, 2009, 2:58 PM
>
>
>In a message dated 10/23/09 12:19:12 PM, kenn_green at yahoo.com writes:
>
>
>I need to get injector pockets installed into the intake manifold and get matching fuel rails.  Is anyone set up to do this, or know someone who isn't real expensive, preferably in the LA or Orange County area?
>
>FWIW, a few guys have done this in the past, to 351-C tunnel-ram intakes, with unknown quality results. The only problem I've heard of concerns the machined orientation of the injectors once spigots are welded into the runners. The nozzles ideally should be aimed so that the spray pattern from each injector is down the port directly at the backside of the intake valve. Most of the weld-ups are not oriented this way, possibly because it results in odd angles for injector tops that force multiple fuel rails, or protruding fuel rails that interfere with other engine parts. So driveability and mileage suffer, but some of the conversions were for street drag racing. Making your own EFI manifold to work well on the street is not a job for a gas station TIG welder, apparently. Good luck- J Deryke 
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